Hi ghanumu,
If the situation with your vision is as extreme as it sounds, then you would likely qualify for 'testing accommodations' (meaning that if you take your GMAT at a Testing Facility, then you might do so in a private room; in addition, you might receive extra time for the Exam - regardless of whether you take the At-home version of the GMAT or you take your Exam at a Test Center). You can learn more about all of that here:
https://www.mba.com/frequently-asked-qu ... sabilitiesThe content of the Exam won't change though, we to properly plan out your studies going forward, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied so far?
2) What study materials do you currently have access to?
3) Have you taken any practice CATs/mocks yet? If you have, then how did you score (including the Quant and Verbal Scaled Scores)?
Goals:
4) What is your overall goal score?
5) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich